<template>
  <div id="aCoursesList" class="bg-fa of">
    <!-- /课程列表 开始 -->
    <section class="container">
      <header class="comm-title">
        <h2 class="fl tac">
          <span class="c-333">全部课程</span>
        </h2>
      </header>
      <section class="c-sort-box">
        <section class="c-s-dl">
          <dl>
            <dt>
              <span class="c-999 fsize14">课程类别</span>
            </dt>
            <dd class="c-s-dl-li">
              <ul class="clearfix">
                <li>
                  <a title="全部" href="#" >全部</a>
                </li>
                <li v-for="(item,index) in subjectNestedList" :key="index" :class="{active:oneIndex==index}">
                  <a :title="item.title" href="#" @click="searchOne(item.id,index)">{{item.title}}</a>
                </li>
                
              </ul>
            </dd>
          </dl>
          <dl>
            <dt>
              <span class="c-999 fsize14"></span>
            </dt>
            <dd class="c-s-dl-li">
              <ul class="clearfix">
                <li v-for="(item,index) in subSubjectList" :key="index" :class="{active:twoIndex==index}">
                  <a :title="item.title" href="#" @click="searchTwo(item.id,index)">{{item.title}}</a>
                </li>
                
              </ul>
            </dd>
          </dl>
          <div class="clear"></div>
        </section>
        <div class="js-wrap">
          <section class="fr">
            <span class="c-ccc">
              <i class="c-master f-fM">1</i>/
              <i class="c-666 f-fM">1</i>
            </span>
          </section>
          <section class="fl"> 
            <ol class="js-tap clearfix"> 
              <li :class="{'current bg-orange':buyCountSort!=''}"> 
                  <a title="销量" href="javascript:void(0);" @click="searchBuyCount()">销量
                 <span :class="{hide:buyCountSort==''}">↓</span> 
               </a>
           </li> 
            <li :class="{'current bg-orange':gmtCreateSort!=''}"> 
                <a title="最新" href="javascript:void(0);" @click="searchGmtCreate()">最新
                   <span :class="{hide:gmtCreateSort==''}">↓</span>
                </a>
          </li>
                    <li :class="{'current bg-orange':priceSort!=''}">
                   <a title="价格" href="javascript:void(0);" @click="searchPrice()">价格&nbsp;
                  <span :class="{hide:priceSort==''}">↓</span>
                  </a>
          </li>
          </ol>
          </section>
        </div>
        <div class="mt40">
          <!-- /无数据提示 开始-->
          <section class="no-data-wrap" v-if="data.total==0">
            <em class="icon30 no-data-ico">&nbsp;</em>
            <span class="c-666 fsize14 ml10 vam">没有相关数据，小编正在努力整理中...</span>
          </section>
          <!-- /无数据提示 结束-->
          <article class="comm-course-list" v-if="data.total>0">
            <ul class="of" id="bna">
              <li v-for="item in data.records" :key="item.id">
                <div class="cc-l-wrap">
                  <section class="course-img">
                    <img :src="item.cover" class="img-responsive" :alt="item.title">
                    <div class="cc-mask">
                      <a :href="'/course/'+item.id" title="开始学习" class="comm-btn c-btn-1">开始学习</a>
                    </div>
                  </section>
                  <h3 class="hLh30 txtOf mt10">
                    <a :href="'/course/'+item.id" :title="item.title" class="course-title fsize18 c-333">{{item.title}}</a>
                  </h3>
                  <section class="mt10 hLh20 of">
                    <span class="fr jgTag bg-green" v-if="Number(item.price)==0">
                      <i class="c-fff fsize12 f-fA">免费</i>
                    </span>
                     <span class="fr jgTag bg-green" v-else>
                      <i class="c-fff fsize12 f-fA">{{item.price}}</i>
                    </span>
                    <span class="fl jgAttr c-ccc f-fA">
                      <i class="c-999 f-fA">9634人学习</i>
                      |
                      <i class="c-999 f-fA">9634评论</i>
                    </span>
                  </section>
                </div>
              </li>
             
            </ul>
            <div class="clear"></div>
          </article>
        </div>
        <!-- 公共分页 开始 -->
        <div> 
           <div class="paging"> 
             <!-- undisable这个class是否存在，取决于数据属性hasPrevious -->
              <a  :class="{undisable: !data.hasPrevious}"
              href="#"
              title="首页"  @click.prevent="gotoPage(1)">首</a>  <a
              :class="{undisable: !data.hasPrevious}" href="#"
              title="前一页"
              @click.prevent="gotoPage(data.current-1)">&lt;</a>
              <a
              v-for="page in data.pages"
              :key="page"
              :class="{current: data.current == page, undisable: data.current == page}"
              :title="'第'+page+'页'"
              href="#"
              @click.prevent="gotoPage(page)">{{ page }}</a>
              <a
              :class="{undisable: !data.hasNext}"
              href="#"
              title="后一页"
              @click.prevent="gotoPage(data.current+1)">&gt;</a>
              <a
              :class="{undisable: !data.hasNext}"
              href="#"
              title="末页"
              @click.prevent="gotoPage(data.pages)">末</a>
              <div class="clear"/>
              </div>
      </div>
        <!-- 公共分页 结束 -->
      </section>
    </section>
    <!-- /课程列表 结束 -->
  </div>
</template>
<script>
import courseApi from '@/api/course'
export default {

        data(){
            return {
              page:1, 
              data:{},
              subjectNestedList: [], // 一级分类列表
              subSubjectList: [], // 二级分类列表

              searchObj: {}, // 查询表单对象

              oneIndex:-1,
              twoIndex:-1,
              buyCountSort:"",
              gmtCreateSort:"",
              priceSort:""
            }
        },
        created(){
          //课程第一次查询
              this.initCourseList()
              //一节分类的显示
              this.initSubject()

        },
        methods :{

              //点击全部按钮显示全部数据
              allPage(){

                    this.initCourseList()
                    this.initSubject()
              },

                 ///1查询第一页数据
            initCourseList(){
              courseApi.getCourseList(1,8,this.searchObj).then(response=>{
                  this.data=response.data.data
              })
            },
           //2查询所有的分类
           initSubject(){
            courseApi.getAlllCourse().then(response=>{
                this.subjectNestedList=response.data.data.list
             
            })
           },
           //3分页切换
               //页面跳转方法  上一页 下一页
      gotoPage(page){
          courseApi.getCourseList(page,8,this.searchObj)
          .then(response=>{
              this.data=response.data.data
          })
      },
      //4点击某个一级分类，显示对应的二级分类
      searchOne(subjectParentId,index){
        //把传递index值赋值给oneIndex，为了active样式生效
        this.oneIndex=index
        this.twoIndex=-1
        this.searchObj.subjectId=""
        this.subSubjectList=[]

        //把一级分类点击di值，复制给searchObj
        this.searchObj.subjectParentId=subjectParentId
        //点击够没一节分类进行页面查询
         this.gotoPage(1)
          //拿着点击一级分类的id，所有一级分类id进行比较，
          //如果id相同，从一级分类里面返回对应的二级分类
          for(let i=0;i<this.subjectNestedList.length;i++){
            //获取每个一级分类
            var oneSubject=this.subjectNestedList[i]
            //比较id是否相同
            if(subjectParentId==oneSubject.id){
                this.subSubjectList=oneSubject.children
            }
          }
      },
      //5点击某个二级分类实现查询
      searchTwo(subjectID,index){
        //把index赋值，为了样式生效
        this.twoIndex=index
        //把二级分裂点击id，赋值给searchObj
        this.searchObj.subjectId=subjectID
        //点击某个二级分类进行条件查询
        this.gotoPage(1)

      },
      //6  根据销量进行排序
      searchBuyCount(){
            //设置对应变量的值，为了样式生效
            this.buyCountSort="1"
            this.gmtCreateSort=""
            this.priceSort=""

            //把值赋值到searchobj中
            this.searchObj.buyCountSort=this.buyCountSort
            this.searchObj.gmtCreateSort=this.gmtCreateSort
            this.searchObj.priceSort=this.priceSort
            //调用方法进行查询
            this.gotoPage(1)
      },
      //7 根据创建时间查询
      searchGmtCreate(){
                 //设置对应变量的值，为了样式生效
            this.buyCountSort=""
            this.gmtCreateSort="1"
            this.priceSort=""

            //把值赋值到searchobj中
            this.searchObj.buyCountSort=this.buyCountSort
            this.searchObj.gmtCreateSort=this.gmtCreateSort
            this.searchObj.priceSort=this.priceSort
            //调用方法进行查询
            this.gotoPage(1)

      },
      //根据价格排序
      searchPrice(){
                   //设置对应变量的值，为了样式生效
            this.buyCountSort=""
            this.gmtCreateSort=""
            this.priceSort="1"

            //把值赋值到searchobj中
            this.searchObj.buyCountSort=this.buyCountSort
            this.searchObj.gmtCreateSort=this.gmtCreateSort
            this.searchObj.priceSort=this.priceSort
            //调用方法进行查询
            this.gotoPage(1)
      }


    }
};
</script>
 <style scoped>
 .active {
 background: #bdbdbd;
 }
 .hide {
 display: none;
 }
 .show {
 display: block;
 }
 </style>